Fire-extinguisher composition.



HARRY S. MORK, OF BROOKL'INE,

i ED STATES; PA 1 MASSACHUSETTS, ASSIGNOR TO AMERICAN OFFICE.

LA FRANCE FIRE ENGINE COMPANY, INC., OF EIJMIZIIBAA NEW YORK, A (JOB- PORATION OF NEW YORK.

FIRE-EXTINGUISHEIR- COMPOSITION.

No Drawing.

To all whom it may concern:

Be'it knownthat I, HARRY S. MoRK, a citizen of the United States, and resident of Brookline, county of Norfolk, State of Massachusetts, have invented a certain new and useful Fire-Extinguisher Composition, of which the following is a specification.

My invention relates in general to fire extinguishing compounds or compositions of the type embodying substances for the production of a relatively heavy blanket of gas or vapor to smother the fire, while at the same time possessing in its normal state, a permanence and so-called nonfreezin character. Carbon-tetrachlorid has alrea ybeen proposed and employed as a principal component of such compositions, and other substances have been added to the carbontetrachlorid to lower its freezing point, to retard the dispersion of the gas or vapor which is produced when the composition is employed for extinguishing the fire, and to reduce the corrosive action of the liquid on the metal of the container in which it is stored for use.

The objects of my invention are to provide an efficient fire extinguishing composition of low freezing point.

The fire extinguishing composition according to my invention, comprises as its essential ingredients, carbon-tetrachlorid chloroform, and an aromatic ester, or a mixture of aromatic esters of relatively high boiling point, or' esters, as for example, triphenyl-phosphate and phenyl salicylate (salol). I prefer-to use triphenyl-phosphate,.which is a crystalline solid, as one of the esters, on account of'ts non-inflammable properties, and I furthermore prefer a mixture of triphenyl-phosphate and phenyl salicylate because proper mixtures of these two esters are liquid even at ordinary temperatures. The proportions of these ingredients may be varied, but in any case, carbon-tetrachlorid constitutes the major portion of the composition. The addition of chloroform to carbon-tetrachlorid has a very marked eflfect in depressing the freezing point, whereas the other two ingredients, triphenyl-phosphate and phenyl salicylate, act in the capacity of forming deposits or coatings upon the burning material. The composition as a whole constitutes a fire extinguishing me- Specification of Letters Patent.

particularly a phenyl ester,

Patented Nov. 13, 1917.

Application filed February 26, 1917. Serial No. 151,099.

forms of containers, without exhibiting'any" serious corrosive effect on the metal of the container (usually brass). and it will stand a temperature of minus 50 F. or lower, without freezing. It is clean and free from disagreeable odor.

As an example of a composition which I have found by experiment to have all the good qualities above enumerated, I may refer to the following: carbon-tetrachlorid 95%, and chloroform 5% by volume. having for each 100 cubic centimeters of this mixture an addition of 2%; grams of a mixture made up of equal parts of triphenyl-phosphate and phenyl salicylate.

The above composition gives a freezing point close to minus 50 F. and has been found by actual test to cause substantially no corrosion of a brass container, after several weeks exposure at approximately 80 F., and to act as an efiicient extinguishing medium. Increased proportions of chloroform, further reduce the freezin point, but increased percentage of tripfienyl phosphate and salol have the opposite effect on the composition and require further proportions of chloroform to maintain the desired low freezing point.

It is not essential that both the triphenylphosphate and the phenyl salicylate be employed together, although I prefer the com position approximately as above given. may, for example, add 5 grams triphenylphosphate in 100 c. c. of a mixture made up of 95% carbon-tetrachlorid and 5% chloroform, by volume, but this composition would be inferior to the one above given, inasmuch as its freezing point is only about minus 40 F. The same quantity of triphenyl-phosphate in 92%% carbon-tetrachlorid and 71}% chloroform, by volume, would give approximately minus 52 F. as the freezing point, and by varying the carbon-tetrachlorid and chloroform to 90% of the former and 10% of the latter, the freezing point would be in the neighborhood of minus 62 F. The same general results are obtained by similar change 1n proportions where phenyl salicylate is used alone in place of the triphenylphosphate, although increased proportions of the chloroform appear to have a more marked effect in depressing the freezing point Where phenyl salicylate is employed alone in this Way. Obviously, Where both of these high boiling point substances are employed, their relative proportions to each other may be varied. I find, however, that the composition of 95% carbon-tetrachlorid and 5% chloroform, containing, for each 100 o. o. 2-3; grams made up of equal parts of triphenyl-phosphate and phenyl salicylate, gives an especially advantageous freezing point with good economy of chloroform, while at the same time offering all the advantages enumerated above for this composition.

I claim 1. A fire extinguishing composition comprising carbon-tetrachlorid, a freezing point lowering component, and an aromatic ester.

2. A fire extingulshing composltlon comprising carbon-tetrachlorid, chloroform, and

an aromatic ester.

3. A fire extinguishing composition comprising carbon-tetrachlorid, a freezing point lowering component, and a phenyl ester.

4. A fire extinguishing composition comprising carbon-tetrachlorid, chloroform, and a phenyl ester.

5. A fire extinguishing composition comprlsing carbontetrachlorid, a freezing point lowering component, and a mixture of aromatic esters.

6. A fire extinguishing composition comprising carbon-tetrachlorid, chloroform, and a mixture of aromatic esters.

7 A fire extinguishing composition comprising carbon-tetrachlorid, a freezing point lowering component, and a mixture of phenyl esters.

8. A fire extinguishing composition comprising carbon-tetrachlorid, chloroform, and a mixture of phenyl esters.

9. A fire extinguishing composition containing carbon-tetrachlorid, chloroform and triphenyl-phosphate.

10. A fire extinguishing composition containing carbon-tetrachlorid, chloroform and phenyl salicylate.

11. A fire extinguishing composition com prising carbon-tetrachlorid, chloroform, triphenyl-phosphate and phenyl salicylate.

2. A fire extinguishing composition comprising substantially a mixture of 95 parts by volume of carbon-tetrachlorid with 5 parts by volume of chloroform, containing or each 100 cubic centimeters of their mixture, 2. grams of triphenyl-phosphate and phenyl salicylate in equal parts.

HARRY S. MORK. 

